[thisisjasononhn]

> Besides the hassle that the paper tickets were (they become unreadable if you look at them wrong)

Or the paper ticket is even slightly bent. Or bent in half. Or mildly wet. Or a corner is folded. Or sometimes it looks fine but just won't work. Or it works at one station but not another.

I say all that because each situation happened to me on my visit to Barcelona this summer :)

I also had a problem where I had to basically rebuy a new 10-trip ticket twice within a day of each other, because the first got folded in a bag, and the other I thought I misplaced (only to find it at the absolute bottom of a heavily packed shopping bag). Oh and the one day I tried to get my folded ticket replaced, the only station I passed through was closed early! How convenient :)

Basically, those paper tickets WERE a pain. But I don't like the new photo ID cards they're introducing either. Good luck I suppose...